Destroy power stations, pipelines, dams and
other means by which they obtain basic utilities.

Take out their gun positions so they cannot fire back.

Destroy their telecoms stations so they cannot communicate.

Analysis

When the enemy loses a particular capability they are weakened such that you
can now use this as a strategic advantage.

If their airfields and aircraft are destroyed, this gives you air superiority
by which you can attack targets at will.

If the weaponry in certain installations is disabled, you can mount frontal
assaults.

If an enemy cannot communicate, it cannot report
on your positions or actions. Nor can it send commands or requests between its
various parts. It thus runs open loop ands effectively rudderless, allowing you
to sneak up unnoticed, to divide and confuse and otherwise cause chaos.

Example

In the 1990-1 Gulf War, the US forces started by disabling Iraqi communications
systems. Later, they destroyed utilities for Bagdad, including electricity
supplies.

Analogy

In negotiations keep people in the negotiating room, stopping them from
taking breaks and stepping out to call headquarters for advice and information.